EP1107651A2 - Dispositif à lampe à décharge - Google Patents

Dispositif à lampe à décharge Download PDF

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Publication number
EP1107651A2
EP1107651A2 EP00126911A EP00126911A EP1107651A2 EP 1107651 A2 EP1107651 A2 EP 1107651A2 EP 00126911 A EP00126911 A EP 00126911A EP 00126911 A EP00126911 A EP 00126911A EP 1107651 A2 EP1107651 A2 EP 1107651A2
Authority
EP
European Patent Office
Prior art keywords
current
gas discharge
discharge lamp
lamp
choke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP00126911A
Other languages
German (de)
English (en)
Other versions
EP1107651A3 (fr
Inventor
Manfred Diez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OTTO DIEZ ELEKTROMASCHINENBAU
Original Assignee
OTTO DIEZ ELEKTROMASCHINENBAU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by OTTO DIEZ ELEKTROMASCHINENBAU filed Critical OTTO DIEZ ELEKTROMASCHINENBAU
Publication of EP1107651A2 publication Critical patent/EP1107651A2/fr
Publication of EP1107651A3 publication Critical patent/EP1107651A3/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously
    • H05B41/42—Controlling the intensity of light discontinuously in two steps only
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3924—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by phase control, e.g. using a triac

Definitions

  • the invention relates to an arrangement with a gas discharge lamp.
  • a gas discharge lamp is used today Drying the label color used.
  • This gas discharge lamp is usually a mercury vapor UV lamp, and the performance of this Spotlight must be precisely regulated and preferably steplessly controlled can.
  • Throttle step switching in which the output changes only in fixed steps can be, or a so-called electronic ballast.
  • Disadvantageous is the high purchase price for electronic ballasts, as well as some manufacturers the non-existent "current brake", i.e. a completely safe working current limitation in the form of an inductor is not intended. This can become one during the heating phase of the lamp uncontrolled current rise, which in extreme cases lead to the explosion of the UV lamp can lead.
  • this object is achieved by the subject of Claim 1.
  • an uncontrolled increase in current excluded because there is always one in line with the gas discharge lamp switched chokes the current through the lamp to an allowable value limited.
  • There is also a continuous adjustment of the lamp power possible typically in a fairly large range from 100% to about 20% of the maximum lamp power. It is very advantageous that one of the current flows to the lamp both chokes even in the time ranges, in which no current flows through the semiconductor power controller because of this Is blocked.
  • the lamp is therefore only de-energized when the one attached to it AC voltage has a zero crossing. This way you avoid so-called dark breaks, in which the lamp does not generate any luminous flux to improve drying performance.
  • FIG. 1 shows a basic circuit diagram of an arrangement according to the invention with a gas discharge lamp in the form of a mercury-vapor UV lamp 10.
  • the lamp 10 can, for example, have a length of 0.5 m, a maximum output of 8 kW and an operating voltage of 450 V.
  • Such lamps are used, for example, in label printing machines to quickly dry the printing ink on the labels.
  • this application is only an example.
  • a single-phase autotransformer 16 is used An isolating transformer (with separate primary and Secondary winding) possible.
  • the Transformer 16 between two terminals 18, 20 a voltage U1 of e.g. 400 V, and between its terminals 18, 22 a higher voltage U2 from e.g. 660 V.
  • the ignition voltage is the voltage that one needed to ignite the lamp 10
  • the burning voltage is the Voltage required for the lamp to operate continuously.
  • the general rule that the longer the lamp, the higher the ignition and burning voltage.
  • the Ignition voltage is usually about 60% higher than the burning voltage, and they is supplied by an igniter 24, its connection L2 with the terminal 20 is connected. As long as the lamp 10 has not ignited, it delivers Ignitor 20 needle-shaped voltage pulses, the amplitude of which Ignition voltage corresponds.
  • the ignitor 24 is in the circuit of the lamp 10 and is usually approved for a maximum current of 20 amps.
  • a first series choke 26 connected, which is designed to match the lamp power limits the maximum allowable value (100%) when the lamp 10 in series with this choke 26 between the terminals 18 and 22 is connected.
  • second series throttle 28 which is designed so that - in connection with the first series choke 26 - the power of the lamp 10 to about 20% limited.
  • This second series inductor 28 has a greater inductance than that first series choke 26.
  • a semiconductor control device is located parallel to the second series choke 28 Form of a thyristor controller 30.
  • thyristor controllers are e.g. of the AEG and manufactured by Eurotherm.
  • the device 30 has one Control input 32, and by an electrical signal at input 32, the Phase angle of the thyristors 34, 36 in the thyristor controller 30 continuously be adjusted.
  • both thyristors 34, 36 are always fully conductive, they bridge the second series throttle 28, so that only the first series throttle 26 is effective and the lamp 10 is operating at full power. If the thyristors 34, 36 in Working phase control, the second series inductor 28 is increasing effective, and the power of the lamp 10 is consequently reduced accordingly. Based on experiments it can be said that in this way a Change in lamp power between 100% and about 20% is possible depending on the design of the second series choke 28.
  • the output LA of the igniter 24 is one via the primary winding Current converter 40 connected to a terminal 42 of the lamp 10, the another connection 44 is connected to the terminal 22 of the transformer 16.
  • the primary winding of a voltage converter is located between the connections 42, 44 46.
  • a controller 50 is preferably provided which has a desired electrical one or thermal size of the lamp 10 regulates.
  • This controller 50 receives one Setpoint from a setpoint generator 52, e.g. a setpoint for the lamp current or the lamp power.
  • the controller 50 from the secondary winding of the voltage converter 46 is an actual value for the voltage uL at the Lamp 10 supplied, also from the secondary winding of the current transformer 40 an actual value for the lamp current iL. Both are only indicated symbolically.
  • a stepless adjustment of the lamp power is thus via the thyristor controller 30 possible, between about 100% and about 20% of the lamp power.
  • the latter can be easily adapted to the printing speed become, i.e. in this case, with increasing printing speed Lamp power automatically increased.
  • the controller 50 can be operated via a Input 56 can be supplied with information about the printing speed.
  • the lamp 10 When switched on, the lamp 10 is initially de-energized and the igniter 24 receives a voltage of approx. 400 V and via its connections D and L2 delivers ignition pulses of e.g. 2 ... 3 kV for the lamp 10, see above that it is ignited and a current flows in it.
  • This stream is going through the first series choke 26 is limited to a non-hazardous maximum value.
  • the setpoint generator 52 After ignition, it usually takes 1 to 2 minutes for the lamp 10 has reached its operating temperature. According to the setpoint from The setpoint generator 52 then turns the lamp power to a desired value adjusted by the phase angle of the thyristors 34, 36 is changed accordingly.
  • the oscillograms in FIGS. 2 to 9 relate to the operation of a UV lamp 10 with a burning voltage of 465 V and a power of about 5 kW.
  • the output of a radiator depends, among other things, on its cooling, i.e. with good cooling, it can be operated with a higher output.
  • This radiator 10 can with the invention in a power range of 4.9 up to 1.44 kW can be operated safely.
  • the maximum current through the lamp 10 is limited to a safe value by the first series choke 26. It there are no dark breaks.
  • the first Series choke 26 had an inductance of 83 mH
  • the second series choke 28 an inductance of 270 mH.
  • the voltage Uth corresponds to the voltage at the second series choke 28. Its peak value is 688 V.
  • the current has the value zero only at the zero crossing, ie there are no dark pauses.
  • the lamp power has its minimum value, which here is about 30% of the maximum lamp power.
  • the peak value of the lamp voltage is 560 V, that of the lamp current is 5.3 A.
  • the effective values are 418 V or 3.75 A, and the power is 1.44 kW. It can be seen that the current iL always flows during an entire half-wave, i.e. without dark pauses.
  • FIG 3 shows the case in which the thyristor controller 30 is fully switched on, so that the lamp 10 operates at its highest power, which is predetermined by the first series choke 26.
  • the current ith is approximately sinusoidal, with a peak value of 17.6 A, and the voltage Uth is practically zero.
  • FIG. 7 shows the voltage UL and the current iL in this case.
  • the peak value of the lamp voltage (624 V) is higher than in FIG. 6, and the peak value of the current (16.4 A) is approximately three times the value of FIG. 6.
  • the effective values are 465 V or 11.48 A, and the power is 4.9 kW with a lamp factor of 0.92.
  • FIG. 4 shows the current ith and the voltage Uth in the event that the thyristor controller is set to a value which is somewhat below the maximum value.
  • the voltage Uth rises and generates voltage peaks 60 with an amplitude of 660 V.
  • Uth is practically zero.
  • the peak value of the current here is 15.8 A.
  • the peak value of the current here is 15.4 A, and the rise in voltage uL is somewhat delayed. Its peak value is 640 V.
  • the RMS values are 470 V or 10.78 A, and the power is 4.66 kW.
  • FIG. 5 shows the voltage and current at the thyristor controller 30 in the event that the thyristor controller is only switched on a little.
  • the peak value of the voltage is 632 V.
  • the current ith only flows during a short part of each half wave and therefore only reaches a peak value of 1.3 A.
  • FIG. 9 shows current and voltage at the lamp 10 in this case.
  • the voltage UL on the lamp 10 is lower. Its peak value is 568 V.
  • the peak value of the current is 7.1 A.
  • the effective values are 424 V or 4.12 A, and the power is 1.6 kW, which is slightly higher than in FIG. 6.
  • the lamp 10 in an inventive Arrangement no dark breaks, which improves drying performance and one enables rapid downsizing to low outputs. You can also in an arrangement according to the invention within a very short time of a low return to the maximum lamp power, e.g. after a Business interruption.
  • Arrangements according to the invention are particularly suitable for the Label printing because in this area today an accurate and preferred continuous control of the UV lamp output is required. In the described arrangement is also an uncontrolled increase in current excluded, since the first series choke 26 the current to the maximum Full load value is limited, and this represents a valuable safety feature at the Invention.
  • FIG. 10 shows a variant of FIG. 1. Parts which are the same or have the same effect as in FIG. 1 are given the same reference numerals as there and are usually not described again.
  • the ignition device 24 ′ is here between the terminal 22 of the autotransformer 60 and the lamp 10 arranged. For this purpose, its connection D with terminal 22 connected, its connection L2 with the terminal 20, and its connection LA with the lamp 10.
  • the voltage U1 (here 400 V).
  • a terminal 21 is provided for the thyristor controller 30, via which have an operating voltage U3 of e.g. 400 V is supplied.
  • FIG. 11 shows a variant of FIG. 1, in which the first series choke 26 is connected in series with the igniter 24 and the lamp 10 between the terminals 18 and 22 of the autotransformer 16, that is to say a voltage U2 of, for example, 660 V.
  • the connection 22 of the ignition device 24 is connected to the terminal 20 so that it receives the operating voltage U1 (400 V).
  • the second series reactor 128 is here between the terminal 12 and the Mains connection L1 arranged, that is to say on the network side of autotransformer 16.
  • Parallel to the second series choke 128 is the thyristor controller 30, which is used for Power supply is connected to the power connector L2, as is the Terminal 14 of autotransformer 16.
  • Between terminals L1 and L2 can e.g. a voltage of 400 V.
  • the second throttle 128 is also here connected in series with the first choke 26, but the current is on the Primary side of the transformer 16 higher than in the circuit of FIG. 1 or 10th
  • the mode of operation is again the same as in Fig. 1, i.e. the second Series choke 128 can also be bridged by thyristor controller 30 here to vary the power of the lamp 10 within wide limits.
  • the higher current load on the actuator 30 is disadvantageous here.
  • Fig. 12 is a variant of Fig. 11, wherein the ignitor 24 'is arranged in the same manner as in Fig. 10, ie its connector D is connected to the terminal 22, its connector L2 to the terminal 20, and its connector L2 with the terminal 20, and its connection LA with the lamp 10.
  • FIG. 13 shows a variant with a series inductor 60, which is arranged between the terminal 18 of the autotransformer 16 and the connection D of the igniter 24, the connection LA of which is connected to the lamp 10, which in turn is connected to the terminal 22 of the transformer 16 .
  • the connection L2 of the ignition device 24 is connected to the terminal 20 of the transformer 16, so that an operating voltage U1 (here 400 V) is present at the ignition device 24.
  • the inductance of the series choke 60 is dimensioned so that it has a power the lamp 10 of about 20% of the nominal power.
  • the series connection of a parallel choke 62 is parallel to the series choke 60 and a thyristor actuator 30 which is connected to the terminal 20 of the Transformer 16 is connected, that is also with the voltage U1 is supplied.
  • the inductor 62 becomes the inductor 60 connected in parallel so that the lamp 10 operates at full power.
  • Adjustment of the thyristor controller 30 can the power of the lamp 10 between 100% (actuator 30 fully conductive) and about 20% (actuator 30 fully blocked) changed become.
  • FIG. 14 shows a variant of FIG. 13, in which the ignition device 24 'is arranged in the same way as in FIGS. 10 and 12. Otherwise, the circuit is constructed in the same way as in FIG recognizes.
  • the arrangement according to FIGS. 13 and 14 also has the advantage that Dark breaks can be avoided because the series choke 60 is constantly on Current can flow to the lamp 10, which only at the zero crossings Voltage is interrupted. This improves drying performance. Also at 13 and 14, the two chokes 60, 62 act as a backup for the Lamp 10 and prevent the current in the lamp 10 from being out of control can increase.
  • control arrangement according to FIG. 1 can be used in the same way in all embodiments, but is only shown explicitly in Fig. 1 for reasons of clarity with an arrangement according to the invention, the power of the lamp 10 can change between 100% and about 20%.
  • control unit 30 instead of thyristors use appropriate transistors in the area of the phase gating switch on and off, but here the effort is great, and corresponding Control devices with transistors are therefore expensive.
  • an isolating transformer may be used instead of a single-phase autotransformer, but this also results in increased costs.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
EP00126911A 1999-12-10 2000-12-08 Dispositif à lampe à décharge Withdrawn EP1107651A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29921660 1999-12-10
DE29921660U 1999-12-10

Publications (2)

Publication Number Publication Date
EP1107651A2 true EP1107651A2 (fr) 2001-06-13
EP1107651A3 EP1107651A3 (fr) 2004-12-08

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EP00126911A Withdrawn EP1107651A3 (fr) 1999-12-10 2000-12-08 Dispositif à lampe à décharge

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054969A1 (de) * 2005-11-16 2007-05-31 Brandenburger Patentverwertung Gbr (Vertretungsberechtigte Gesellschafter Herr Joachim Brandenburger Verfahren zum Betrieb einer Strahlungsquelle mit einer UV-Licht erzeugenden Lampe zur Bestrahlung von Innenwänden langgestreckter Hohlräume sowie Anordnung zur Durchführung des Verfahrens
ITRN20090034A1 (it) * 2009-07-21 2009-10-20 Umpi R E D Srl Dispositivo per regolare la luminosita' di lampade a scarica

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1308133A (en) * 1969-02-20 1973-02-21 Littlejohn Electronics Ltd H P Gas discharge tube power supplies
DE2262629C3 (de) * 1972-12-21 1980-09-04 Siegfried Theimer Gmbh, 6481 Obersotzbach Schaltungsanordnung zur Konstantregelung der Helligkeit einer impulsbetriebenen Gasentladungslampe
DE2417262A1 (de) * 1973-04-23 1974-11-07 Esquire Inc Helligkeitssteuerschaltung fuer gasentladungslampen
US3894265A (en) * 1974-02-11 1975-07-08 Esquire Inc High intensity lamp dimming circuit
CA1112295A (fr) * 1978-03-31 1981-11-10 Nabil K. Takla Regulateurs d'eclairage programmables
DE3438002A1 (de) * 1984-10-17 1986-04-17 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zum zuenden und betrieb von gasentladungslampen
US4795945A (en) * 1987-05-07 1989-01-03 The Forest Electric Company Starting circuit for high intensity gaseous discharge lamps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005054969A1 (de) * 2005-11-16 2007-05-31 Brandenburger Patentverwertung Gbr (Vertretungsberechtigte Gesellschafter Herr Joachim Brandenburger Verfahren zum Betrieb einer Strahlungsquelle mit einer UV-Licht erzeugenden Lampe zur Bestrahlung von Innenwänden langgestreckter Hohlräume sowie Anordnung zur Durchführung des Verfahrens
ITRN20090034A1 (it) * 2009-07-21 2009-10-20 Umpi R E D Srl Dispositivo per regolare la luminosita' di lampade a scarica

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Publication number Publication date
EP1107651A3 (fr) 2004-12-08

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